Buffing-machine.



F. W. RICHARDS.

BUFFING MACHINE.

APPLICATION FILED SEPT. 12, 1913.

Patented May 11, 1915.

6 SHEETS-SHEET l.

0 am 0 a N F. W. RICHARDS.

BUFFING MACHiNE. APPLICATION HLED SEPT. 12, 1913.

L13 $71 O Patented May 11 1915.

6 SHEETS-S HEET 2.

wa/mwm F. W. RECHARDS.

BUFFING wmcmwe. APPLICATION FILED SEPT. 12, 1913. 1 139 371 0 Patented May 11, 1915.

6 SHEETS-SHEET 3- F. W. RICHARDS.

BUFFING MACHINE.

Areucmon men SEPT. 12, 1913.

@Miormag vg F. W. RICHARDS.

BUFFING MACHINE.

APPLICATION FILED SEPT- 12. 1913.

F. W. RICHARDS.

BUFFING MACHINE.

APPLICATION FILED SEPT. 12, 1913.

151539 371., menm May 11, 1915.

6 SHEETS- -SHEET 6.

"UNITED STATlEd PATENT FRANK W. RICHARDS, OF HOTCI-IKISSVILLE, CONNECTICUT, ASSIGNOB 0F ONE-HALF T0 CHRISTIAN M. NEWMAN, OF BRIDGEPORT, CONNECTICUT.

BUFFING-MACHINE.

inseam.

Application filed September 12, 1913.

brass work as for instance drawn shells andv tubes of various sorts as well as cast pieces of different kinds.

It is the purpose of my invention to provide a machine that is adapted to buff a large variety and sizes of metal parts of "arious kinds and especially to buff brass pieces rapidly and inexpensively and thus at a minimum cost; especially to design a machine which will require but one attendant to operate it and whose duty it will be to simply put the work on and take it off from the machine.

The machine includes a rotary table upon which is mounted a series of chucks or work carrying spindles that are also given an independent rotary movement.

A series of h rizontally as well as vertically operating bulling wheels are suitably located to operate upon the work carried by these spindles while they are in motion so as to insure all parts of the work being operated upon.

Automatic means is also provided for applying the tripoli, a polishing compound, at suitable intervals without stopping the machine or interfering in any way with its operation.

Upon the accompanying drawings forming a part of this specification similar characters of reference will be found to designate like or corresponding parts throughout the several figures and of which.

Figure 1, shows a top plan view of my buffing machine complete. Fig. 2, is a side elevation of the same machine as seen from the near side of the drawing as seen in Fig. 1. Fig. 3, is a front elevation or end view of the machine as seen from the left of Fig. 1. Fig. l, is a longitudinal vertical sectional view taken on line 41 of Fig. 1. Fig. 5, is a detail vertical sectional view through one of the bufiing wheels and spindle therefor. Fig. 6, is a Specification of Letters Patent.

Patented May 3131., 1915..

Serial No. 789,494.

plan view of the work carrying turret and bed of the machine, upon which said turrent is 11101 ited. Fig. 7, is a somewhat similar plan view of the bed of the machine said bed being broken away and the operative mechanism beneath the bed being shown in sectional plan. Fig. 8, is an enlarged sectional plan view of the duplicate tripoli applying mechanism as it appears with relation to the work carrying turret and spindles mounted thereon, and, Fig. 9, shows a detail sectional view taken on line 99 of Fig. 8 to show the means for raising and lowering the polishing compound.

Referring in detail to the characters of reference marked upon the drawings, 1 represents the bed of the machine, 2 legs upon which it is mounted, 3 and 4 large rearwardly extended brackets which are bolted to and supported upon the bed, themo teg ends of said brackets being connected together by a plate 5 that extends from the end of one bracket to the end of the other.

A third arm 6 is secured to and extends from one side of the machine to support a third set of pulley and belt-driving connections.

A series of vertically disposed columns 7 are mounted upon the bed and serve to support a top plate 8 upon which is mounted a series of slides, pulleys, buffing wheels, &c., as will later be more fully explained.

The under side of the bed of the machine is hollow and accommodates more or less of the operating mechanism as will be particularly noted from Figs. 4 and 7 and especially serves to accommodate the mechanism for operating the rotary table as will. now be more fully described.

A suitable cylindrical casing 9 is located in a round opening of and is secured to the before mentioned bed of the machine by screw bolts 10, see Fig. 4, and is provided with" a ceritral bearing 11 in which one end of a driving shaft 12 is journaled. Upon the lower end of this shaft is mounted the beveled pinion 13 that meshes with and is driven by a smaller pinion 14 mounted upon a horizontal shaft 15 journaled in hangers secured to the under side of the bed. Upon the outer end of this shaft 15 mounted a driving pulley 16 to which power is imparted to the machine through a main driving belt 17.

Upon the inside of the cylindrical mem her 9 is formed a hub 18 and adjacent to said hub is also formed an annular bearing 19. A rocker arm 20 is journaled upon this hub 18 as is also a special form of ratchet wheel 21. The cylindrical bearing portion of this ratchet wheel is j ournaled upon the beforementioned hub 18 while the annular flange 22 of the ratchet wheel has its bearing in an annular pocket formed in the upper edge of the cylindrical casin 9.

The joint formed between the edge of the flange 22 and the upper edge of the cylindrical member 9 is covered with an annular ring 23 so as to inclose the said casing 9 and protect the operative parts contained therein from dirt.

A pawl 24 is mounted upon one end, of the rocker arm 20 to engage, the teeth of the ratchet wheel 21 in a way to move the same in a forward direction only.

The opposite end 25 of the rocker arm 20 is provided with a segment 26 that is engaged by a rack 27. This rack, see Fig. 7 is mounted to slide longitudinally in a guide way formed in the casing 9 and has secured to its end a cross arm 28 in which is formed a slot that is engaged by a pin 29 carried by a disk wheel 30. This disk is mounted upon a shaft 31 that is journaled in hangers 32 secured to the under side of the bed. A gear 33 is also secured to this shaft and meshes with and is driven by a pinion 34 secured to a short shaft 35 journaled in a hanger secured to the under side of the bed.

A large gear 36 is likewise mounted upon the shaft 35 and meshes with and is driven by a smaller pinion 37 secured upon a driving shaft 38 journaled in bearings secured to the bed. The outer end of this driving shaft 38 is provided with a cone belt pulley 39 by means of which the said train of mechanism is operated bya second and independent driving belt, not shown. This line of operating mechanism obviously serves to rotate the table and to impart to it an intermittent rotary movement so as to carry the spindles from station to station at suitable intervals as will later be more fully explained.

The before mentioned gear 33 also meshes with and drives a gear 40 mounted upon a cross shaft 41 journaled in hangers secured to the under side of the bed, and upon the outer end of this cross shaft is also mounted a gear 42 that meshes with and drives a gear 43 upon a short shaft 44. Upon the outer end of this short shaft 44 is secured a cam 45 which serves to engage a roller mounted upon a bell crank lever 46 pivotally mounte upon a bracket 47 secured to the side of the bed of the machine. The other end of this bell crank lever is operatively connected with a slide 48 that is mounted to operate in vertical ways 49 formed upon a vertically disposed bracket 50.

'vided wit The slide 48 includes a bearing 51 in which is mounted a spindle 52 that carries upon its inner end a buffing wheel 53 and upon its outer end a driving pulley 54 said driving'pulley being controlled and driven by a third and independent belt 55. This bufiin wheel 53 is thus mounted to operate direct y over the top end of the respective spindles 56 carried by the turret 57 when the said turret is positioned for operation. The line of movement thus described obviously serves to lower the bufiing wheel in position to operate upon Work carried by the spindles of the table when said work is'positioned beneath the bufling wheel and likewise to raise the bufling wheel from such work when the table with spindles are moved forward, to position the next spindle for a similar operation.

The before mentioned turret 57 which is secured to the upper end of the shaft 12 is designed to be rotated therewith, and is formed of a lower member 58 which is hollowed out to form a recess and of an upper member 59 that constitutes a top or cover for the lower member, and serves to inclose the operating gearscontained therein. The under side of the table rests upon the before mentioned flange 22 of the ratchet wheel 21 and thus serves to rigidly support the same.

The table as shown is substantially round and is provided with a series of vertically disposed spindles 56 mounted in its upper edge portion. These spindles are journaled in hubs of the table and are each provided with a screw 60 and alock nut whereby the said spindles may be adjusted vertically to take up wear which may occur from time to time.

Each spindle is provided with a pinion 61' is mounted upon a stud secured to the under member 58 of the table and said idler in turn is engaged and driven by a pinion 64 mounted upon the upper end of the shaft 12. From the foregolng construction it will be noted that this shaft 12 is driven through the before mentioned shaft 15 by a separate belt connection and serves to continuously rotate the table and with it the small pinion 64. The pinion 64 in turn operates the idler gear which meshes with one of the pinions 61 and that in turn operates the larger gear 62. This large gear operates each of the remaining smaller or spindle gears and the result is that all the spindles operate alike and in the same direction and against the movement of the bufling, wheels as will be lat fi'1 explained.d f h (11 be eup ren o tespin esmay rof any suitable means for holding the work to be attached thereto according to the particular character of the work.

The machine is provided with both horizontal and vertical operating buffing wheels, the first of which serve to buff the sides of the work and the latter to buff the ends or top as occasion may require. The horizontal operating butling wheels and 66 are arranged in pairs so to speak and are located opposite to each other, the wheel 65 of each pair being arranged over the table and upon the inside of the path of movement of the work carrying spindles 56, while the other Wheels 66 are arranged off from the table and outside of the line of travel of the said Work carrying spindles. There are preferably three of these pairs of bufing wheels upon one of my machines and of the particular type and character shown in the drawings, and each pair are so arranged as to be driven by the same belt, and from an overhead counter or driving shaft. As before stated each of these pairs of buffing wheels and mechanism for operating the same are substantially alike in construction and therefore it is thought that a single detail description of one set will suifice for all and therefore we will describe but one set in detail, as follows: Suitable oblong openings 67 are formed in the top plate 8 for the bearings of each of the pairs oi butiing wheels and upon each side of the opening is formed a suitable guideway 68 that is covered with plates 69 to accommodate .the spindle bearings 70 and 71 that are mounted in said guideways see Fig. 5. These bearings serve to accommodate the spindles 72 and 73 of the inner and outer bufiing wheels 65 and 66 respectively. The spindles 72 and 73, see Fig. 5, extend up vertically through the bearing 70 and are each provided with belt pulleys 74 and 75 upon their upper ends and by means of which they are driven by a suitable belt as will later be more fully explained.

An adjustable screw 76 is journaled in the end plate 77 and is provided with a right and left hand thread to engage the respective bearings 70 and 71 and upon its outer end is mounted a hand wheel 78 by means of which the screw is operated and the adjustable bearings made to move to and from one another according to the adjustment of the wheel and screw and so that the bufling wheel 65 and 66 may be set near to or farther from each other according to the character of the work performed.

Belt wheel 74. and 75 are mounted on and serve to drive each of the said spindles 72 and 73 and are driven in opposite directions by a single belt 79. This belt like the others of its kind is shown to be connected from above and is brought down and passed around the fixed idler pulley 80 mounted upon one Of the before mentioned brackets 3, 4, or 6. The belt is then passed around one of the spindle pulleys 75 and next around another idler pulley 81 journaled upon a stud secured to the table 7. The belt is further passed around the outer pulley 7- and then to a third idler 82 journaled in a hanger 83 secured to a slide bracket 84 and provided with weight 85 that serves to draw the bracket and pulley 82 outward at all times and in a manner to provide a tension for the pulley. Both of the members of the belt as between the pulley 80 and 74 and between the pulleys 75 and 82 are twisted so as to run from a vertical to a horizontal plain and so as to accommodate and drive the horizontally arranged bufling wheels which are mounted on vertical spindles and at a right angle to the power shaft (not shown).

As above stated ll provide automatic means for applying the polishing compound to some of the bufiing wheels of the machine at such times as is desired, and while it would be practical to employ substantially the same devices for applying the polishing compound to other of the wheels than those shown, yet for the purpose of illustration 1 have shown these devices as applied to the rear of the machine for the application of the tripoli to rear bufiing wheels only. The other wheels, however, are so located and arranged that they can be gotten at very conveniently by the operator who can apply the tripoli by hand, if desired. The said devices are best shown in Figs. 1, 8 and 9 and as will be noted are in the form of a duplicate device, designed to be operated simultaneously and from the same source, in a manner to apply the tripoli to the outer and rear bufiing wheels designated as 66. The respective tripoli devices are designated as 85 and 86 and are pivoted to swing upon brackets 85 and 86 which in turn are secured to the before mentioned brackets 3 and 4. These devices are hung to swing horizontally and upon Vertical pivots which serve for their attachment to the said brackets.

In so far as the two tripoli devices are substantially alike in construction I will offer a detailed description of but one of them, but will make due reference to the connections whereby they are both simultaneously operated. A bracket 87 is clamped to the post 7 extending up from the bed of the top plate of the machine, and upon this bracket is pivoted arms 88 and 89. The outer end of the arm 89 is connected by a link 90 with the tripoli carrying device 85,

while the other arm 88 is connected by a link 93 with a similar tripoli carrying device 86. The inner endiportions of these two arms 88 and 89 are connected by means of a spring 92 which serves to hold the said ends together, and the opposite ends apart.

The inner end portion of the arm 89 is connected by a link 91 with the outer end portion of the arm 88 so as to cause the outer end portion of said arm to be thrown inward when the inner end of the arm 89 is deflected outward. The inner end portion of the arm 88 is provided with a contact roll 94 which is engaged by the several lugs 95 mounted upon the spindle base of the rotary table as the table moves around. The table obviously turns in the direction indicated by the arrow (1, while the buffing wheels run in the several directions indicated by the arrows b and c. It will thus be noted that the inner bufling wheels run in an' opposite direction from the outer ones and thus the'action of the one, upon the stock carried by the s indles, is counteracted by the action 0 the other buffing wheels thereby equalizing the strain upon the work and spindles.

From the foregoing it will be seen that as the table rotates and the spindles are brought around from station to station the lugs 95 i will come into contact with the roll 94: of the arm 88 causing the said arm to swing upon its pivot to the left, as seen in Fig. 8, against the action of its spring 92 and in a way to force the rod 93 and the tripoli carrying device 86 to the right against the action of the spring96 to cause the tripoli 97 to be brought in contact with the buffing wheel 66. At this same instant the other arm 89 is also operated through the link connection 91 and its outer end is moved inward toward the other arm 88 in a way to shove the rod 90 out and swing the tripoli carrying device 85 upon its pivot and against the action of its spring.

The respective tripoli operating devices as before stated are substantially alike in construction and are each hun to swing on vertical pintles 98. A guide p ate 99 which i is provided withknuckles through which the said pintles pass serve as one member of the hinge and likewise the means to which the tripoli applying device is connected and with respect towhich it may be adjusted vertically to better aline the brick of tripoli with the polishin wheels.

A plate 100 is tted to slide vertically in V the ways of the before mentioned guide member 99 and like it is provided with a lughaving a threaded hole therethrough and through which the adjusting screw 101 asses for the movement of said plate and its attached parts up and down. The said plate 100 which is guided to be slid vertically in the before mentioned plate 99 is slidably connected therewith by means of bolts 102 that pass through vertical slots in the said plate 99 and engage the plate 100 so as to retain the same in close relation to the first mentioned plate and to firmly secure the parts in position. The arm 103 is appears in Fig. 8. These frames for supporting the bricks are preferably made of sheet metal parts and are pivotally connected to the before mentioned arms as at 104 and each includes a strap 105 which is extended to support the sheet metal side plates 106 and between which the said bricks are frictionally held. The other end portion of these sheet metal plates as will be seen are supported by a further metal strip 107 which is connected by a return member 108 that in turn connects with the before mentioned pivotal member 105.

The spring 96 before mentioned is mounted upon a rod 109 that is pivoted at 110 to the link 108. This rod is slidably mounted in a lug 111 secured to the brackets 3 and 1.

A spring arm 112 is pivotally connected to the before mentioned arm 103 and its outer free end is made to engage the back end of the tripoli in a way to force it forward through the sheet metal guides in position to operate upon the work when the device is thrown forward in the position indicated by dotted lines. This tripoli applying device is provided with an automatic feeding mechanism which serves to gradually feed the tripoli forward as it is ground oil by the wheels, and this mechanism as will be seen comprises a screw 116 one end of which is seated in the before mentioned arm 103 and projects rearward and is further provided with a nut 113 which works against the back of the said spring arm 112. A suitable ratchet wheel 114: is secured to this screw and serves to turn the same through the before mentioned nut 113 in a way to increase the pressure upon the spring arm with each movement of the tripoli applying device.

The before mentioned arm 108 extends outward beyond the strap 105 and upon it is mounted a yieldable finger 115 that is at all times in engagement with the said ratchet wheel and which moves forward and backward upon the face of the said wheel with each swing of the arm 103 suflicient to turn the said ratchet wheel and its screw and thus effect a tightening of the spring arm 112 upon the end of the brick. This serves to gradually feed the two bricks within the holder forward until the outer one has been ground down to a small bit whereupon the nut 113 is run back and a second brick is put in from the back and the end of the spring arm 112 again adjusted to shove the new brick forward against the end of the front brick which is in position to be swung for- The operator stands at the front of the machine where it will be seen several of the spindles are exposed and not in position to be worked upon. While in these positions the finished work may be removed from the spindles and the new Work placed thereon in position. The spindles are continuously driven and the table is moved step by step which keeps the respective spindles and work in position to be operated upon. In this connection it will be seen that the spindles first pass under the bufiing Wheel 53 which serves to polish the top end of the work and from here it is carried on around by the movement of the table to the respective pairs of wheels and 66 that polishes the sides. This form of operation continues until the work is completed and the spindle again arrives at the front when the Work is removed and additional pieces to be polished are put 011.

Having thus described my invention what I claim and desire to secure by Letters Patent is 1. In a butting-machine of the class described, the combination with a rotary table, a series of rotatable work carrying spindles mounted on the table, means for simultaneously operating all of the said spindles, a horizontally operating bufing-wheel mounted over the table and designed to work against the inner side of the spindles, and a second buffing-wheel to Work against the outer side of the spindles.

2. In a butting-machine of the class described, the combination of a rotary table, a series of rotatable work carrying spindles mounted on the table, means for simultaneously operating all of the said spindles, a horizontally operating butting wheel mounted over the table and designed to work against the inner side of the spindles, a second butting-wheel to work against the outer side of the spindles and a single belt to drive both of the said buffing wheels in opposite directions.

3. In a bufling-machine of the class described, the combination of a rotary table, a series of rotatable work carrying spindles mounted on the table, means for simultaneously operating all of the said spindles, a horizontally operating bufiing-wheel adapted to work against the outer side of the work carried on the spindles, and a vertically operating butting-Wheel to work against the end portions of the Work carried upon the spindles.

4. In a landing machine of the class described, the combination with a rotary table, a series of rotatable Work carrying spindles mounted on the table, means for simultaneously operating all of the said spindles, a horizontally operating butting-wheel mounted over the table and designed to Work against the inner side of the spindles, a second butting-wheel to work against the outer side of the spindles, a single belt for driving the said butting-wheels in op osite directions and a third and vertically arranged buffing-wheel to work against the top of the spindles.

5. In a bufling machine of the class described, the combination with a rotary table, a series of rotatable Work carrying spindles mounted on the table, means for simultaneously operating all of the said spindles, a horizontally operating butting-Wheel mounted over the table and designed to work against the inner side of the spindles, a second butting-wheel to Work against the outer side of the spindles, and means for moving the two said buffing-wheels toward and from each other.

6. In a butting-machine of the class described, the combination of a rotary table, a series of rotatable work carr ing spindles mounted on the table, means or simultaneously operating all of the said spindles, a series of horizontally operating pairs of butting-wheels adapted to operate against opposite sides of the spindles carried by the table, and a vertically operating buttingwheel adapted to operate against the end portion of the spindles.

7. In a bufling machine of the class described, the combination of a rotary table, a series of rotatable Work carrying spindles mounted on the table, means for simultan'eously operating all of the said spindles a series of horizontally operating pairs 0% bufiin -wheels adapted to operate against opposite sides of the spindles carried by the table, a vertically operating buffing-wheel adapted to operate against the end portion of the spindles, and means for moving the 105 vertically operating wheel to and from the. said spindles.

8. In a bufling machine of the class described, the combination of a rotary table, a series of rotatable work carr ing spindles 1 o mounted on the table, means or simultaneously operating all of the said spindles, a series of horizontally operating pairs of butting-wheels adapted to operate against opposite sides of the spindles carried by the 115 table, means for automatically applying a polishing compound to the said bulfingwheels, and a vertically operating butiingwheel adapted to operate against the end portion of the spindles.

9. In a butting machine of the class described, the combination with a rotary table, means for alternately rotating the said table a given distance, a series of rotatable work carrying spindles mounted on the table, 125 means for simultaneously rotating all of the said spindles, a horizontally operating buffing-wheel mounted over the table and designed to work against the inner side of the spindles, a second butting-Wheel to work 130 against the outer side of the spindles, and a third and vertically arranged buffing-wheel to work against the top of the spindles.

10. In a buffing machine of the class described, the combination with a rotary ,table, a series of rotatable work carrying sp ndles mounted on the table, means for simultaneously operating all of the said spindles, a horizontally operating bufiing wheel mounted over the table and designed to work against the inner side of the spindles, a second bufiing wheel to work against the outer side of the s indles, means for movmg the two said bu ng wheels toward and from each other, and a single belt connected to operate both of the said bufiing wheels and m opposite directions.

11. In a bufling machine of the class described, the comblnation with a rotary table, a series of rotatable 'work carrying spindles mounted on the table, means for simultaneously operating all of the said spindles, a horizontally operating bufiin wheel mounted over the table and designed to work against one side of the spindles, a second bufiing wheel to work against the outer side of the spindles, means for dr1v1ng the bulling wheels in opposite directions, a third and vertically arranged bufiing work against the top of the spindles, and means for lowering and raising the last mentioned bufiin'g wheel to engage and (11S- engage the work.

12. In a bufling machine of the class described, the combination with a rotary table and work carrying spindles mounted therein, of a frame plate provided with guideways, bearings mounted in said guideways, means for adjustin the bearings toward and from the. spin les, bufling wheels designed to work a ainst the spindles and mounted upon sha ts journaled in the bearings, and a single belt connection for driving the two said shafts and bufiing wheels.

13. In a bufiing machine of the class described, the comblnation with a rotary table and work carrying spindles mounted therein, of a frame plate provided with guideways, bearings mounted in said guideways, means for adjustin the bearings to and from each other, sha ts mounted in the bearings, buflin wheels upon one end of the shafts and elt pulleys upon the other, an idler pulley mounted upon the frame plate, a single belt connection for engaging the idlers, and bufiinughwheel pulleys applied to drive the said b g wheels in opposite directions.

14. In a bufling machine of the class described, the combmation with a rotary table bearing a series of work carrying spindles, of a pair of bufling wheels adapted to operate against the opposite sides of said spindles, means for ad usting the bufling wheels to and from each'other, belt pulleys for drivwheel to ing the said bufling wheel shafts, idlers, a belt applied around the said pulleys to drive the Wheels in opposite directions, one of the said idlers bein adjustable and weighted to take up the slac in the belt.

15. The combination with a rotary table having a series of work carrying spindles, of a bufiing wheel adapted to engage the top ends of the Work carrying spindles and mounted upon a horizontally disposed shaft, a vertically movable bearing in which the said bufling wheel shaft isjournaled, a cam and lever connection for raising and lowering the said bearing, shaft and bufiing wheel to cause the latter to engage and disengage the work upon the spindles.

16. In a bufiing machine of the class described, the combination with a bed and casing supported therein, a central vertically disposed shaft journaled in the casing, a table mounted upon the shaft, a series of vertically disposed work carrying spindles journaled in the table, means for operating the shaft and table to turn the same, and connections'between the shaft and work carrying spindles to continuously rotate the latter. I

17. In a bufling machine of the class described, the combination of a bed, a casing mounted therein, a pulley and ratchet device mounted within the casing, a rotary table mounted upon the ratchet and adapted to be turned successively thereby, work carrying spindles mounted in the table, and means for rotating said spindles.

18. In a bufling machine of the class described, the combination with a bed, of a casing mounted therein, a vertically disposed shaft journaled in the casing, a rotary table mounted upon the shaft, a ratchet wheel connected with the rotary table, a reciprocating device carrying a pawl to engage the ratchet to turn the same and the table successively for: predetermined distances, a series of work carrying spindles mounted in the table, a gear connection for the said vertically disposed shaft to the spindles for continuously rotating the same.

19. In a buflin machine of the class described, the comblnation with a rotary table and a series of work carrying spindles mounted on the table, of a series of bufiing wheels to operate against the opposite sides of the work carrymg spindles, polishingcompound carrying devices, and means for automatically operating the same to ap ly the polishing-compound to the bufiihg wheels at suitable intervals.

20, In a buifing machine of the class described, the combination with a rotary table and a series of rotatable work carrying spindles mounted on the table, of a device adapted to support a brick of polishingcompound, means for normally holding the said device away from the bufling wheel,

ma am and automatic mechanism for operating the said device to swing the brick of compound forward in the path of movement of the said buffing wheels.

21. In a bufing machine of the class described, the combination of a rotary table carrying a series of work supporting spin- (lles, of a device for supporting a brick of polishing material, means for automatically operating the said device to move the brick forward and backward into and out of the path of movement of the bufiing wheel, and means for automatically feeding the said brick forward within the said supporting device as it is ground away by the bufling wheels.

22. In a bufing machine of the class described, the combination of a rotary table carrying a series of work supporting spindles, of a device for supporting a brick of compound, means for automatically operating the said device to move the brick forward and backward into the path of movement of the bufiing wheel, and means for adjusting the said supporting device and brick up and down to be brought into alinement with the bufling wheels.

23. In a bufiing machine of the class described, the combination with a rotary table and a series of work carryingspindles, of

r a pair of devices for supporting a brick of polishing-compound and adapted to be swung forward and backward in position to be engaged by a pair of bg wheels, springs for normally holding the said devices away and out of engagement from the buffing wheels, pivotal lever connections adapted to be engaged by the movement of the table and connections with the said devices to move the same and the brick of polishing compound forward to engage the buding wheels.

24. In a bufing machine, the combination of a device for supporting a brick of polishing compound comprising a swmgin bracket adapted to support a brick of polishing-compound, a spring for normally holding the bracket in its normal position, means for shoving the bracket forward against the action of the spring at predetermined times, a ratchet and screw device carried by the bracket and adapted to be automatically operated at each swing of the bracket, a nut mounted upon the screw and a spring arm that is engaged by the nut and which in turn engages the brick carried in the bracket whereby the latter is moved forward with each swing of the arm.

Signed at Bridgeport, in the county of Fairfield and State of Connecticut, this 2nd day of September, A. D. 1913.

FRANK W. RIGDS. 

